That is a great idea using a 3-D printer to fabricate the slide-on template. I don't have a 3-D printer but in the mean time many 3-D printer services companies like Shapeways.com accept most types 3-D CAD drawing files or you can use their free CAD programs to make your designs. However, I like the capabilities of your 3-D printer and have considered getting one. Thank you for the excellent details. Paul Jones